Slowdown of spring green-up advancements in boreal forests

Park, Hoonyoung1; Jeong, Su-Jong2; Ho, Chang-Hoi1; Park, Chang-Eui3; Kim, Jinwon4

2018-11

10.1016/j.rse.2018.08.012

REMOTE SENSING OF ENVIRONMENT   影响因子和分区

0034-4257

1879-0704

There is a consensus that the spring phenology of deciduous forests is advancing in response to global warming. Since the late 1990s, however, this tendency of spring phenology advancement has been weakened in over 60% of boreal forests, particularly in Siberia (- 0.58 day yr(-1) for 1982-1997 vs. - 0.17 day yr(-1) for 1982-2013) and northwestern North America (NWNA; -0.42 day yr(-1) for 1982-1997 vs. 0.07 day yr(-1) for 1982-2013). This study investigated the major factor in the weakening trends in the advancement of the start of the growing season (SOS) based on the satellite-observed normalized difference vegetation index (NDVI) in two regions by quantifying the effects of four climatic fields winter duration (WD; the number of freezing days), pre-season temperature (PT; accumulated temperature from late winter to early spring), green-up temperature (GT; accumulated temperature around the green-up date), and pre-season precipitation (PR; accumulated precipitation before the green-up date) on changes in the spring green-up trend. The GT explained the majority of the slowdown in the SOS trends in recent decades. In Siberia, the GT increases contributed to the advancement of the SOS during the 1980s and 1990s; however, the GT increase reduced to less than half of these periods resulting in a slowdown of the SOS advancing trend since the early 2000s. In NWNA, GT increases and WD shortening drove the SOS advancement until the late 1990s; however, both effects have been diminished to near zero to result in no further SOS advancements. This study demonstrates that the recent slowdown of the SOS advancing trends over Siberia and NWNA was largely attributed to the weakening of the warming trends, rather than the sensitivity changes of spring phenology to climate variables. This study suggests that the natural climate variability strongly affects the decadal variations in the boreal forest spring phenology.

Slowdown of green-up trends Vegetation phenology The start of the growing season Climate change Boreal forests

SCI ; EI

英语

其他

NIMS/KMA[NIMS-2016-3100]

Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology

Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology

WOS:000447570900015

ELSEVIER SCIENCE INC

20183405721637

Climate change ; Global warming ; Systems engineering ; Vegetation

Atmospheric Properties:443.1 ; Systems Science:961

GEOSCIENCES

Web of Science

1.Seoul Natl Univ, Sch Earth & Environm Sci, Seoul, South Korea
2.Seoul Natl Univ, Grad Sch Environm Studies, Seoul, South Korea
3.Southern Univ Sci & Technol China SUSTech, Sch Environm Sci & Engn, Shenzhen, Peoples R China
4.Natl Inst Meteorol Sci, Climate Res Div, Seogwipo, South Korea

Park, Hoonyoung,Jeong, Su-Jong,Ho, Chang-Hoi,et al. Slowdown of spring green-up advancements in boreal forests[J]. REMOTE SENSING OF ENVIRONMENT,2018,217:191-202.

Park, Hoonyoung,Jeong, Su-Jong,Ho, Chang-Hoi,Park, Chang-Eui,&Kim, Jinwon.(2018).Slowdown of spring green-up advancements in boreal forests.REMOTE SENSING OF ENVIRONMENT,217,191-202.

Park, Hoonyoung,et al."Slowdown of spring green-up advancements in boreal forests".REMOTE SENSING OF ENVIRONMENT 217(2018):191-202.